[ ˌɛmfɪ'si:mə ]
■ noun Medicine
1》 (also pulmonary ~ ) a condition in which the air sacs of the lungs are damaged and enlarged, causing breathlessness.
2》 a condition in which air is abnormally present within the body tissues.
Origin
C17: via late L. from Gk emphusēma , from emphusan 'puff up'.